ausblenden:
Schlagwörter:
DIFFERENTIAL-PHASE-SHIFT; PARAMETRIC DOWN-CONVERSION; DIFFIE-HELLMAN
PROTOCOL; SINGLE-PHOTON DETECTORS; UNCONDITIONAL SECURITY; PRIVACY
AMPLIFICATION; ENTANGLED PHOTONS; COHERENT STATES; DISTRIBUTION-SYSTEM;
ORTHOGONAL STATESPhysics; cryptographic protocols; information theory; quantum cryptography;
Zusammenfassung:
Quantum key distribution (QKD) is the first quantum information task to reach the level of mature technology, already fit for commercialization. It aims at the creation of a secret key between authorized partners connected by a quantum channel and a classical authenticated channel. The security of the key can in principle be guaranteed without putting any restriction on an eavesdropper's power. This article provides a concise up-to-date review of QKD, biased toward the practical side. Essential theoretical tools that have been developed to assess the security of the main experimental platforms are presented (discrete-variable, continuous-variable, and distributed-phase-reference protocols).
